Market rate on everything except batteries. Batteries can be lower or higher, depends on what you need. And really watch what you get, I'm a 1972 vintage, and Auburn had new batteries in stock older than me when I worked there. Mostly oddball 6v stuff, but still, 40+ year old batteries, with a zero return/exchange policy, always seemed kinda "off" to me. But, where else are you going to get a 1940s Indian Chief spec battery, same day? We had them...
Shop wisely... and if the Emgo brake package you want is yellow, walk away. Asbestos and/or imminent glue failure. Those brakes were packaged in the 1970s and/or early 80s. You can buy the riveted lining replacements, just wear gloves, they are from the 60s and older, regardless of manufacturer.